Finding the Fourth Proportional to 13,499.63, 18,629.30 and 7,531.40

Step by Step Solution

1. Step 1: Write the proportion equation
   13,499.63 : 18,629.30 = 7,531.40 : x
2. Step 2: Convert to fraction form
   13,499.63/18,629.30 = 7,531.40/x
3. Step 3: Cross multiply
   13,499.63x = 18,629.30 × 7,531.40
4. Step 4: Simplify right side
   13,499.63x = 140,304,710.02
5. Step 5: Solve for x
   x = 140,304,710.02/13,499.63
6. Step 6: Final answer
   x = 10,393.23